[PATCH 5.10 115/199] counter:ti-eqep: remove floor

Greg Kroah-Hartman
2021-01-26T09:47:37Z

From: David Lechner <david@lechnology.com>

commit 49a9565a7a7ce168e3e6482fb24e62d12f72ab81 upstream.

The hardware doesn't support this. QPOSINIT is an initialization value
that is triggered by other things. When the counter overflows, it
always wraps around to zero.

Fixes: f213729f6796 "counter: new TI eQEP driver"
Signed-off-by: David Lechner <david@lechnology.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20201214000927.1793062-1-david@lechnology.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/counter/ti-eqep.c | 35 -----------------------------------
1 file changed, 35 deletions(-)

--- a/drivers/counter/ti-eqep.c
+++ b/drivers/counter/ti-eqep.c
@@ -235,36 +235,6 @@ static ssize_t ti_eqep_position_ceiling_
return len;
}

-static ssize_t ti_eqep_position_floor_read(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, char *buf)
-{
- struct ti_eqep_cnt *priv = counter->priv;
- u32 qposinit;
-
- regmap_read(priv->regmap32, QPOSINIT, &qposinit);
-
- return sprintf(buf, "%u\n", qposinit);
-}
-
-static ssize_t ti_eqep_position_floor_write(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, const char *buf,
- size_t len)
-{
- struct ti_eqep_cnt *priv = counter->priv;
- int err;
- u32 res;
-
- err = kstrtouint(buf, 0, &res);
- if (err < 0)
- return err;
-
- regmap_write(priv->regmap32, QPOSINIT, res);
-
- return len;
-}
-
static ssize_t ti_eqep_position_enable_read(struct counter_device *counter,
struct counter_count *count,
void *ext_priv, char *buf)
@@ -302,11 +272,6 @@ static struct counter_count_ext ti_eqep_
.write = ti_eqep_position_ceiling_write,
},
{
- .name = "floor",
- .read = ti_eqep_position_floor_read,
- .write = ti_eqep_position_floor_write,
- },
- {
.name = "enable",
.read = ti_eqep_position_enable_read,
.write = ti_eqep_position_enable_write,